Jackowski, Antoni, Danuta Ptaszycka-Jackowska, and Izabela Sołjan. “The World System of Pilgrimage Centres”. Turyzm/Tourism 12, no. 2 (December 30, 2002): 51–63. Accessed May 4, 2024. https://czasopisma.uni.lodz.pl/tourism/article/view/10069.